US 12,217,465 B2
Method and apparatus for point cloud coding
Wen Gao, West Windsor, NJ (US); Xiang Zhang, Sunnyvale, CA (US); and Shan Liu, San Jose, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed on Sep. 3, 2021, as Appl. No. 17/466,729.
Claims priority of provisional application 63/121,835, filed on Dec. 4, 2020.
Prior Publication US 2022/0180567 A1, Jun. 9, 2022
Int. Cl. G06T 9/40 (2006.01); G06T 3/40 (2006.01); G06T 9/00 (2006.01)
CPC G06T 9/001 (2013.01) [G06T 3/40 (2013.01); G06T 9/40 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of point cloud geometry encoding in a point cloud encoder, comprising:
performing a geometry coding on a point cloud at a first partition depth;
determining a plurality of largest coding units (LCUs) of the point cloud at a second partition depth;
setting (i) a coding state of a first LCU of the plurality of LCUs of the point cloud at the second partition depth based on an initial state or a coding state that is obtained after the point cloud is coded according to the geometry coding at the first partition depth and (ii) a coding state of a second LCU of the plurality of LCUs that is subsequent to the first LCU based on a stored state that is stored before the second LCU at the second partition depth is encoded; and
performing the geometry coding on the plurality of LCUs of the point cloud at the second partition depth based on the set coding states of the plurality of LCUs at the second partition depth,
wherein the coding state of the first LCU comprises geometry occupancy history information associated with the first LCU.